[feature][connectors-v2] Support in predicate pushdown in paimon

[hawk9821]

Purpose of this pull request

Does this PR introduce any user-facing change?

How was this patch tested?

Check list

• If any new Jar binary package adding in your PR, please add License Notice according
  New License Guide
• If necessary, please update the documentation to describe the new feature. https://github.com/apache/seatunnel/tree/dev/docs
• If you are contributing the connector code, please check that the following files are updated:
  1. Update plugin-mapping.properties and add new connector information in it
  2. Update the pom file of seatunnel-dist
  3. Add ci label in label-scope-conf
  4. Add e2e testcase in seatunnel-e2e
  5. Update connector plugin_config

[Copilot]

Pull Request Overview

This pull request adds support for predicate pushdown in Paimon by extending SQL predicate conversion to handle IN and NOT IN expressions, updates corresponding configuration files for end-to-end tests, and improves documentation to reflect these capabilities.

• Added new configuration files (filter6 and filter7) to test IN/NOT IN predicate pushdown.
• Extended the SQL predicate converter to handle IN expressions.
• Updated documentation in both Chinese and English regarding supported operators.

Reviewed Changes

Copilot reviewed 6 out of 6 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
seatunnel-e2e/seatunnel-connector-v2-e2e/connector-paimon-e2e/src/test/resources/paimon_to_assert_with_filter7.conf	New end-to-end test configuration for NOT IN filtering.
seatunnel-e2e/seatunnel-connector-v2-e2e/connector-paimon-e2e/src/test/resources/paimon_to_assert_with_filter6.conf	New end-to-end test configuration for IN filtering.
seatunnel-e2e/seatunnel-connector-v2-e2e/connector-paimon-e2e/src/test/java/org/apache/seatunnel/e2e/connector/paimon/PaimonSinkCDCIT.java	Extended test cases to run the new configurations.
seatunnel-connectors-v2/connector-paimon/src/main/java/org/apache/seatunnel/connectors/seatunnel/paimon/source/converter/SqlToPaimonPredicateConverter.java	Added logic to handle IN expressions in SQL predicate conversion.
docs/zh/connector-v2/source/Paimon.md docs/en/connector-v2/source/Paimon.md	Updated documentation with IN and NOT IN operator support.

Comments suppressed due to low confidence (2)

seatunnel-connectors-v2/connector-paimon/src/main/java/org/apache/seatunnel/connectors/seatunnel/paimon/source/converter/SqlToPaimonPredicateConverter.java:300

• [nitpick] There is a typo in the variable name 'theFiled'; consider renaming it to 'theField' for improved clarity.

Optional<DataField> theFiled =

seatunnel-connectors-v2/connector-paimon/src/main/java/org/apache/seatunnel/connectors/seatunnel/paimon/source/converter/SqlToPaimonPredicateConverter.java:268

• Consider adding negative test cases to verify that handleInExpression correctly throws exceptions for empty expression lists and for cases when null values are encountered within the IN clause.

if (expressions.isEmpty()) {